Are you able to tell me if the Cybooks are able to take all the formats on fictionwise; and if not, which ones do i avoid when buying.

With FictionWise multi-format books you get all the formats for one price, and can download a different format later if you get a new reading device. If you want simplicity, then only buy multi-format or Secure MobiPocket e-books for your Cybook. Download the .PRC (MobiPocket) version of multi-format e-books. It is also possible to buy Secure Microsoft Reader (LIT) e-books, if you have a Windows PC, and convert them to DRM-free MOBI (where format shifting a DRM protected file is legal). If an e-book is only available in eReader format, this can probably be converted to DRM-free MOBI too - but the longest and best track record belongs to the LIT to MOBI approach. NEVER buy Secure Adobe Reader e-books.